Machine for dovetailing window-sashes.



No. 741,093. A BA'I'ENTBD OGT. 13, 1903. N. BARRETT. MACHINE FOR DOVETAILING WINDOW ASHES.

APPLICATION FILED MIG. 4, 1903.

No MODEL. 2 SHEETS-SHEET 1.

[n2/.enfer No. 7413093. f ATENTED 00T. 13, 1903.

N. BARRETT.

lymmim EUR DOVBTAILING WINDQW AsHEs. l

' APPLICATION FILED AUG. 4, 1903.

I N0 MQDEL. 2 SHEETS-SHEET 2.

Weies. UNITED STATES Patented October A.13, 1903.

PATENT NOAI-I BARRETT, OF TRURO, CANADA, ASSIGNOR OF ONE-HALE TO LORENZO SPENCER, OF TRURO, NOVA SCOTIA, CANADA.

MACHINE FOR DOVETAILING \NIN[BONN-SASHES.

SPECIFIATION forming part of Letters Patent No. 741,093, dated October 13, 1903. Application illed Angust'fl, 1903. Serial No. 1681240. (No model.)

To a/Z wiz/0m it may concern:

Be it known that I, NOAH BARRETT, a British subject, residing at Truro,in the county of Colchester, in the Province of Nova Scotia c and Dominion of Canada, have invented a new and useful Machine for Dovetailing Window-Sashes, of which the followingis a specification.

My invention relatesto machines for cutting the dovetail joint between the meetingrails and Stiles of Window-sashes; and the object of my invention is to provide a machine simple in construction,eoonomical to operate, and one which entirely eliminates handwerk from the cutting of the joint. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a plan of the machine. Fig. 2 is a side elevation of the machine. Fig. 3 is an enlarged section on line d b of Fig. 1, showing the adjustable stile-table and connections. Fig. 4 is an enlarged bottom view of the second cut tapered liner ,e shown in section in Fig. 3. Fig. 5 is an enlarged crosssection on line c d looking toward the saw, showing the adjustable rail-table and connections. Fig. 6 is full-size portion of a sashstile, showing the dovetail out on the end of it. Fig. 7 is an end view of the corresponding meeting-rail. Fig. 8 is an enlarged face view of the tilting fence.

Similar letters refer to similar parts throughout the several views.

In the drawings, A is the frame of the machine.

B is the top of the machine.

a is the vertically-adjustable stile-table.

b is the vertically-ad j ustable rail-table.

c is the saw, which is about one-quarter of an inch in thickness and is vertically adj ustable by means of the adjusting-screw o.

d is the saw-spindle.

e is the driving-pulley.

f f are the ad justing-slides to regulate the vertical adjustment of the tables a and b.

g g are the regulating-screws of the adjustj ing-slides ff.

i c' 'i t' are supports tables.

h h h h are compression-springs for holding the tables in place.

carrying the adjustable j is the adjustable fence on the stile-table a.

Z is the tilting fence for the rail-table.

7c is the adjustable tilting-fence holder.

m 'm are thin steel protecting-plates on the 55 fences to prevent the sash from being spalled by the cutting-0f the saw.

n is a metal angle-plate with one end turned up, attached to the bottom of the second cnt tapered liner z. It is longitudinally adjust- 6o able thereon and is for the purpose of regulating the vertical adjustment of said liner.

It also serves as a stop for the same and to give the proper depth to the second cut.

p are two set-screws to adjust the swing of the tilting fence l, which is pvoted at q on the stud r.

t t are stops for the purpose of regulating the depth of the cut in the material operated on.

S S are the carriers for the stops t and are 7o adjustable at one end.

w is a light carriage, which is movable on the slides 'n and is for the purpose of forming the check F in the sash-stile.

The operation of the machine is as follows: Commencing with the stilesin Fig.6,thecheck F is formed as described, the tapered linere is removed, the stile is run onto the saw against the stop t, forming the out Gr, the liner ,z is then replaced, and the stile again run So onto the saw against the upright part of the metal plate n, forming the beveled out I. 'The rail, Fig. '7, is then placed flat on the table b against the fence Z and is run. onto the saw against the stop t, forming the cut H;Y The fence l is then tilted in the required direction. Therailis placed against the tilted fence, and again run onto the saw, forming the cut J. When the machine is properly adjusted, the tongue E will exactly lill the recess formed 9o by the cuts II and J.

Having described and illustrated my ma.- chine, what I claim, and desire to secure by Letters Patent, is v 1. In a sash-dovetailing machine, a vertically-adjustable circular saw revolving in a horizontal plane, in combination with the vertically-adjustable table a, coiled pressuresprings, the vertical horizontally-adj ustable fence j carrying a metal protecting-plate, the roo tapering liner z, and the movable angle-plate n; substantially as set forth. j

ing a longitudinally-pivoted fence, a'tapering liner vertically adjustable by means of a movable angle-plate attached thereto, longitudinally-adjustable stops to regulate the depth of the saw-cuts, and the carriage all substantially as described and Yfor the purpose specified.

In testimony whereof I have .signed my name to this specification in the presence of two subscribing Witnesses.

NOAH BARRETT.

Witnesses:

WM. M. FERGUSON, HUGH MACKEEGA. 

